The line of intersection of two surfaces of a sloping roof forming an internal angle less than 180°, is known as

The line of intersection of two surfaces of a sloping roof forming an

1.	The line of intersection of two surfaces of a sloping roof forming an internal angle less than 180°, is known as
A.	Ridge
B.	Hip
C.	Valley
D.	None of these
Answer» D. None of these